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Root knot disease of tomato

This PPT includes introduction, symptoms, pathogen, life cycle and management of Root Knot of Tomato or Vegetables

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Root knot disease of tomato

  1. 1. Root Knot of Tomato/Vegetables DR. RAJBIR SINGH Assistant Professor Department of Plant Pathology Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India Affiliated to Ch. Charan Singh University, Meerut (UP), India Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com Cell No. 91-9456613374
  2. 2. Root Knot of Tomato / Vegetables • Infect brinjal, okra, cucurbits, chili, g. nut etc. • All over the world • All parts of country • More disease when with fungi & bacteria • Loss – 60% in all vegetables
  3. 3. Symptoms : • Slow growth & dwarfing • ↓ Leaf size • Yellowing of leaves • Pl. show nutrition deficiency • Wilting if Fusarium, Rhizoctonia, Verticillum etc. present • Some time scroching of leaf in margin • Patches in the field
  4. 4. • Main symptoms – root knot / root gall • Main & lateral roots – swell –spherical to elongate • Galls d/n in shape & size • Rotting of gall • No flowering / less flowering • No fruiting / less fruiting
  5. 5. Pathogen – Meloidogyne javanica M. incognita M. arenaria • Egg size – 67 – 128 x 33 - 52 µm (ellipsoid) • Adult male – 1.2 – 1.5 mm (long) • 0.03 – 0.36 mm (width) • Female – 0.42 – 1.3 mm (long), pear shaped • 400 – 500 eggs / female
  6. 6. • Survive in soil as gall – later galls rotting- nematode free • Larva move – 1 cm/day • Roots exudates attract larva • Larva secret saliva into the pl. cell • II & III stage larva differentiate by stylet & stouter • IVth stage - differentiate ♂ / ♀ • Sex depend on nutrition • Sex differentiation – sexual dimorphism
  7. 7. • Giant cell – dissolution of middle lemma • Hypertrophy & Hyperplasia – gall formed • Gall – paricycle, paranchyma & endodermis cells • Life cycle - 25 days at 27° C 80 days at 14° C • Tem. – 25 - 28° C • Soil – sandy loam
  8. 8. Disease Management • Selection of field • Field sanitation • Crop rotation of 2-3 years • Deep ploughing • Flooding • Organic amendments – saw dust, neem cake, jatropha @250 Q/ha. Use before 3 weeks of planting • Streaming – hot water - 50° C for 30 minutes • Feuradan – 2.5 kg / ha, Temic, Thimate, Nemacur @ 25kg/ha, Carbofuran, Rugby @ 2 kg a.i./ ha • Dis. Res. Var.- SL 120, Nematex, Banaraj joint, PV - 1, Hissar Lalit
  9. 9. Thank You

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This PPT includes introduction, symptoms, pathogen, life cycle and management of Root Knot of Tomato or Vegetables

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